Pigs (you know, the animal that bacon actually comes from) mostly live off of human waste (aka garbage). They are the origin of the H1N1 virus (also known as the flu) and when not contained they are considered absolute pests.
I appreciate the humor but I think your initial comparison is pretty bad.
Wild pigs don’t depend on waste from humans. They’re invasive to the Americas, sure, but there is a huge difference between hunting an invasive species that is wreaking havoc in the ecosystem (and possibly going through your “waste”) versus raising domesticated pigs in abysmal conditions — and all other associated negative consequences — for a market with inflated demand.
Also, the issue with H1N1 is, again, mostly due to farming.
So, no, pigs inherently aren’t “almost parasites” and although they can get diseases, like all animals, the threat of transmitting those diseases to humans come from farming practices.
Mosquitoes are consequential and our relationship with pigs is largely voluntary. The difference is enormous.
Curious what the fantasy world you live in looks like. Where industrial hog farms have garbage trucks heading into them and not trucks of purpose grown feed. I guess you wouldn't have many landfills either.
texas has huge issues with feral hog populations. get yourself a squadron of helos, go find the herds and turn them into bacon: feral hog bacon is like cheating the system, they're a nuisance and threaten livelihoods and kill more people than sharks.